My gut says run another can of BG44K and see what takes place. It cleared one side and may to the same on the second go-around.

 

Good advice. 11.5 volts is not marginal, it's too low. Here's why...
Modern cars are essentially rolling computer systems comprised of multiple computers that constantly receive feedback on the car's performance via electronic sensors attached to the major parts of your car. Analog devices (e.g. a light bulb) will usually work, albeit not at peak performance, even when voltage drops. Digital devices, on the other hand, have very narrow voltage requirements so they either work or, if voltage drops, they don't - in the computer world it's either a 1 or a 0 - on or off. There's no in-between.

Therefore, if the battery's voltage is too low, some of the car's digital devices may temporarily stop working, usually triggering one or more codes and possibly even sending your car into Limp Mode or Restricted Performance.

Don't panic and think you suddenly need thousands of $$ worth of repairs until you have first fully charged your battery. Then troubleshoot. Optimum charge is at least 12.5 volts.

BTW - You may notice this same behavior on your laptop computer...as the battery fades, devices like your DVD player or touchpad might stop working. They aren't broken; there's simply not enough juice to power everything. Recharge the laptop, reboot, and all your computer's devices work again.

I apologize if this explanation seems oversimplified. See the link in my signature for more battery info.

 

I did replace the MAF but not with an OEM. I purchased it at the local AutoZone. Could that be a problem?

 

Thanks for the input! I did have to replace the battery a few months ago. It was the original battery and was quite old. I started getting crazy problems including a gear box error. I replaced the battery and it all was fixed. That was pretty crazy to me, but your explanation makes total sense.

 

Definitely. I replaced a MAFS on an S4 with a rebuilt Autozone unit, and I had the same rich codes as before. After disassembley, the rebuilt unit looked like it was put together with paper clips and a hot glue gun. I got another MAFS and the trouble codes have not come back after several weeks. Not saying that's what happened with your case, but it is a possibility.

 

Google "fuel trims" to read about them. In the meantime, these will get you started with understanding what they are and why they're a valuable diagnostic tool...

 

A Bluetooth OBD2 reader and the Torque app cost $35 and will give you a huge amount of real-time information including short and long term fuel trims. The app logs data while driving and emails excel files.


You will be amazed how much information is available

 

I have a sneaky suspicion that I am having the same problem. I'm going to replace the one I have and see what happens.

 

THANKS!!!! I will read up on this!

 

THANK YOU!!! I am ordering an OBD2 reader now. Is there an iPhone version of the Torque app? Or can you recommend an iPhone app?

 

I think you're right. I am going to get another can of the stuff. I guess it can't hurt even if it doesn't solve the problem.

 

Last I checked, Torque wasn't availabe for iPhone, so I use EngineLink HD on both my iPhone & iPad. It too can email. However, this app is designed specifically for LELink (Low Energy Bluetooth) code readers, which apparently is the only type of Bluetooth reader that is compatible with iPhone.

If you didn't buy an LELink reader, then you must use a WiFi reader with an iPhone. Standard Bluetooth readers are incompatible (unless Apple has fixed its OS to accommodate them).

If you get a WiFi code reader, Torque is highly rated. Search the app store and read the user reviews for more info.

 

Thank you for the files 1&2.. several lights came on.. These should be up top there first page with tips etc.. What do you call s "sticky" or something?

Part One--Fuel Trim Primer Rev2.pdf (813.7 KB, 9 views) Part Two--Using Fuel Trims.pdf (1.02 MB, 5 views)

 

I agree ZenFly, this should be a Sticky on the main page.

 

They are on my page if you need them again.

 

I bought a can of BG44k but then read that the oil should be changed right after. What is your opinion because I have less than 3,000mi since my last change..

 

I would not be overly concerned about the oil.

Gus
www.jagrepair.com

 

Thanks. I haven't read anywhere that it was mandatory only some reports that the oil was darker after use..

 

Looks like I have the same problem. I received my bluetooth code reader and it pulls up the P0101 code registering a MAF fault. I'll purchase on OEM and hope that solves the problem!